Wire Shelving -- Create your own unit Modular wire storage systems offer a combination of shelf and post sizes to meet any application. The split sleeve connectors with grooved numbered post allows for easy and quick assembly. The shelves are constructed of all welded wire mats and supported with architectural wire trusses providing 800 lb. capacity per shelf. Leveling legs support each corner on stationary units and polyurethane non-marking casters can be added to mobilize unit.